题目

Number x is randomly selected from the integers 42 to 92 inclusive

Quantity A

The probability that x is odd

Quantity B

The probability that x is even

选项

A.

Quantity A is greater.

B.

Quantity B is greater.

C.

The two quantities are equal.

D.

The relationship cannot be determined from the information given.

解析

总数 = (92-42)+1 = 51 奇数总数 = 51-((92-42)+1)/2 奇数总数 = 51-26 = 25 偶数总数 = 51-25 = 26 A项 P(x为奇数) = 25/51 B项 P(x为偶数) = 26/51 B项更大
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